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Finding the Fourth Proportional to 404,640.80, 606,961.20 and 155,328.80

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Solution

The fourth proportional to 404,640.80, 606,961.20 and 155,328.80 is: 232,993.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    404,640.80 : 606,961.20 = 155,328.80 : x
  2. Step 2: Convert to fraction form
    404,640.80/606,961.20 = 155,328.80/x
  3. Step 3: Cross multiply
    404,640.80x = 606,961.20 × 155,328.80
  4. Step 4: Simplify right side
    404,640.80x = 94,278,554,842.56
  5. Step 5: Solve for x
    x = 94,278,554,842.56/404,640.80
  6. Step 6: Final answer
    x = 232,993.20

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.